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<script>
    //匿名函数
    var f=function(){};

    //ES5
    console.log(f.name);//""

    //ES6
    console.log(f.name);//"f"

    //具名函数
    const myfun = function fun(){};

    //ES2
    console.log(myfun.name);//"fun"

    //ES6
    console.log(myfun.name);//"fun"


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